Pretty it up

Added model and version info to scanner class
Rearranged buttons and added Model and Version display

Signed-off-by: Bill Waggoner <ctgreybeard@gmail.com>
Fine tuning

Threading: move status checks to a separate thread
Pretty: Correctly set Hold t startup, Model and Version info display
Signed-off-by: Bill Waggoner <ctgreybeard@gmail.com>